CVE-2019-10099

Sensitive data written to disk unencrypted in Spark

7.5 HighFix available

CVE-2019-10099 is a high vulnerability (CVSS 7.5) in Apache Spark, published August 7, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. Fixed in org.apache.spark:spark-core_2.11 2.3.3.

Prior to Spark 2.3.3, in certain situations Spark would write user data to local disk unencrypted, even if spark.io.encryption.enabled=true. This includes cached blocks that are fetched to disk (controlled by spark.maxRemoteBlockSizeFetchToMem); in SparkR, using parallelize; in Pyspark, using broadcast and parallelize; and use of python udfs.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.30%Down 1.2 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2019-10099
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-312
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-10099
Updated: 2026-11-02

EUVDEUVD-2019-0110 No score

Record: EUVD-2019-0110
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fp5j-3fpf-mhj5 8.7

Sensitive data written to disk unencrypted in Spark

Record: GHSA-fp5j-3fpf-mhj5
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312
Updated: 2026-11-02

OSV 7.5

Record: CVE-2019-10099
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVGHSA-fp5j-3fpf-mhj5 8.7

Sensitive data written to disk unencrypted in Spark

Record: GHSA-fp5j-3fpf-mhj5
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312
Updated: 2026-11-02

OSVPYSEC-2019-114 No score

Record: PYSEC-2019-114
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.spark:spark-core_2.11` Maven	before 2.3.3	2.3.3
`pyspark` PyPI	before 2.3.3	2.3.3
`org.apache.spark:spark-core_2.11` Maven	before 2.3.3, plus listed versions 1.2.01.2.11.2.21.3.01.3.1 Show 24 moreShow less 1.4.01.4.11.5.01.5.11.5.21.6.01.6.11.6.21.6.32.0.02.0.0-preview2.0.12.0.22.1.02.1.12.1.22.1.32.2.02.2.12.2.22.2.32.3.02.3.12.3.2	2.3.3
`pyspark` PyPI	before 2.3.3, plus listed versions 2.1.12.1.22.1.32.2.02.2.1 Show 5 moreShow less 2.2.22.2.32.3.02.3.12.3.2	2.3.3

History

History
When	Changed	Sources
2026-11-03	aliases, products	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV